오픈소스 CFD 코드 오픈폼(OpenFOAM)을 이용한 가스터빈엔진 노즐-터빈 유동 해석

OpenFOAM is widely used open source CFD code. In this study the performance of OpenFOAM to simulate nozzle-turbine flow is evaluated. Single stage nozzle-turbine of radial gas turbine engine is simulated. To simulate nozzle-turbine flow, the capability of compressible flow, MRF, cylic boundary condition and non-matching grid interface are needed. snappyHexMesh of OpenFOAM is used to generate mesh and steady DensityBasedTurbo solver of OpenFOAM-1.6-ext is used for flow compressibility, cyclic난gi boundary condition is used, and overlapGgi method for non-matching grid interface between nozzle and turbine. We compared results of OpenFOAM with commercial CFD code. OpenFOAM shows enough capability for industrial turbine simulation and shows some advantages and disadvantages comparing to commercial CFD code.